By 2030, the Décret tertiaire (France's tertiary decree on energy savings in commercial buildings) requires a -40% cut in energy consumption compared with a reference year[1][1]RegulationLégifrance, “Decree No. 2019-771 of 23 July 2019 on actions to reduce final energy consumption in buildings used for commercial purposes” (Décret tertiaire)See in sources ↓. Same deadline for existing commercial buildings whose heating or cooling has a rated useful output of 70 to 290 kW: they will need a building management system (BMS) that meets the BACS requirement (French decree 2020-887 on building automation and control systems)[2][2]RegulationLégifrance, “Decree No. 2025-1343 of 26 December 2025 amending the application dates of the obligations concerning building automation and control systems in commercial buildings”, article 1, postponement to 1 January 2030 for existing buildings of 70 to 290 kWSee in sources ↓.
The usual reflex: add a dashboard to the property portfolio. It spots drifts without correcting them. Here is what an energy management platform must cover, what it will never do and how to verify its savings.
What an energy management platform really does and why commercial portfolios adopt one
Platform, EMS or software: one tool that collects, normalizes and alerts
Platform, EMS, software: the same thing, three words. This tool serves energy management: it collects the energy data of each site, normalizes it with heating degree days (HDD), detects drifts, raises alerts and produces the reporting. An energy management system does not act on equipment.
It equips the follow-up of the energy management system in the ISO 50001 sense (EnMS, called SMÉ in France), that is, the continuous improvement process. Like any energy management solution, it depends entirely on the quality of its readings.
EMS, EnMS, BMS, hypervisor: who observes, who decides, who acts?
The energy management software tools fall into building blocks that do not do the same job. An energy management system observes and alerts. The EnMS organizes the decisions, the BMS acts on equipment and the hypervisor aggregates several sites. The table below follows this chain from sensor to decision and shows where each block stops.
| Criterion | EMS platform | ISO 50001 EnMS | BACS-compliant BMS | Hypervisor | Predictive control |
|---|---|---|---|---|---|
| What it observes | Consumption per site and per use, invoices, meter readings, HDD. | Significant energy uses and their energy performance indicators (EnPIs). | The installation's points: temperatures, valve states, flow rates, alarms. | The supervisors of several sites and several BMS brands. | BMS histories, weather (temperature and solar radiation), occupancy. |
| What it decides | Nothing. It flags a drift and produces the reporting. | The objectives, the priorities and the action plan. | The execution of the programmed sequences and setpoints. | Nothing. It aggregates and compares. | Predictive optimization: setpoints anticipated according to solar radiation and the building's thermal inertia. |
| What it actually operates | No equipment. An alert, a report. | No equipment. Actions assigned to named owners. | Valves, pumps, AHUs, boilers and chillers, via the controllers. | Nothing of its own. It can relay a setpoint to a BMS if the integration allows it. | The setpoints of the existing BMS, with no hardware replacement. |
| Input data required | Reliable meters, invoices, floor areas, HDD. | An energy review and a documented baseline. | Sensors and meters wired to the controllers. | Access to the supervisors, notably over BACnet or LonWorks. | Active trend logging and write access to the BMS points. |
| Obligation covered | None of its own. It prepares the consumption figures reported on OPERAT (ADEME's annual reporting platform). | Depending on the organization's consumption level (Directive (EU) 2023/1791). | BACS decree: hourly monitoring per functional zone, detection of efficiency losses. | None of its own. | None of its own. It relies on the BMS. |
| What it will never do | Correct an optimal start that kicks in too early: it records it without changing any setpoint in the BMS. | Adjust a piece of equipment. | Normalize and compare heterogeneous sites on its own. | Replace the local control of the controllers. | Make up for an unreliable BMS or unusable histories. |
Read the “what it actually operates” row: an EMS on its own, like any monitoring software, lists no equipment there. On the regulatory compliance side, the BACS decree requires the system to provide hourly monitoring per functional zone and to detect efficiency losses[3][3]RegulationLégifrance, “Decree No. 2020-887 of 20 July 2020 on building automation and control systems in non-residential buildings and automatic heat regulation” (BACS decree)See in sources ↓.
The process itself falls under the ISO 50001 standard, published in 2011 and revised in 2018[4][4]Standards and protocolsISO, “ISO 50001, Energy management systems”, revised version of 2018 (first edition 2011)See in sources ↓: it frames the EnMS without making certification mandatory. Likewise, BACS compliance and eligibility for CEE energy-savings certificates (certificats d'économies d'énergie, sheet BAT-TH-116) must not be confused: the first is an obligation, the second a source of funding.
Does an energy management platform replace the BMS?
No. The EMS detects the drift, the BMS corrects it. An energy management platform that does not write to the building management system remains a dashboard. The EnMS changes nothing here: it organizes the response without adjusting any equipment.
Compliance is not enough either. We have seen BMSs that were perfectly compliant on paper and unable to hold a setpoint three years after handover.
Bringing together data scattered across meters, BMS and suppliers
In a property portfolio, energy data lives in three worlds: meters, BMS trend logs and supplier invoices. The energy platform brings them into a single energy consumption history that dashboards read without reprocessing. The operator's workflow no longer depends on a spreadsheet.
That is the first real benefit. Not yet a saving.
Spotting a drift before it shows up on the invoice
An energy drift stays invisible on a monthly invoice. The AHU that overconsumes a little more every day alerts no one until the filter change.
Same with the VIP complaint: the setpoint raised for the director on the top floor (his 24 °C all year round, seen many times) never comes back down.
Or with a degraded mode forgotten after a breakdown. Caught early, the deviation is corrected before it has cost anything: the operations team can optimize consumption instead of searching at year-end for ways to lower the energy bill.
What data does the tertiary decree require from the platform?
None. The legal obligation, which stems from article 175 of the ÉLAN law (French Law No. 2018-1021 on housing, urban planning and digital technology)[5][5]RegulationLégifrance, “Law No. 2018-1021 of 23 November 2018 on the evolution of housing, urban planning and digital technology (ÉLAN law)”, article 175See in sources ↓, rests on the declarant, not on the tool. Each year, the declarant enters on the OPERAT platform run by ADEME[6][6]Bodies and institutionsADEME, “OPERAT”, annual consumption reporting platform for commercial buildingsSee in sources ↓ its consumption per energy source, its floor areas and its usage intensity indicators. The target: cut this consumption by 40% by 2030[1][1]RegulationLégifrance, “Decree No. 2019-771 of 23 July 2019 on actions to reduce final energy consumption in buildings used for commercial purposes” (Décret tertiaire)See in sources ↓.
The BACS requirement works differently: hourly time step, functional zone[3][3]RegulationLégifrance, “Decree No. 2020-887 of 20 July 2020 on building automation and control systems in non-residential buildings and automatic heat regulation” (BACS decree)See in sources ↓ and a deadline of 1 January 2030 for the 70 to 290 kW band[2][2]RegulationLégifrance, “Decree No. 2025-1343 of 26 December 2025 amending the application dates of the obligations concerning building automation and control systems in commercial buildings”, article 1, postponement to 1 January 2030 for existing buildings of 70 to 290 kWSee in sources ↓.
Did you know? The BACS decree does not impose any NF EN ISO 52120-1 class. It sets its own functional requirements[3][3]RegulationLégifrance, “Decree No. 2020-887 of 20 July 2020 on building automation and control systems in non-residential buildings and automatic heat regulation” (BACS decree)See in sources ↓.
The underlying issue remains the reduction of greenhouse gas emissions, to be demonstrated with reliable readings.
Before signing: size the platform to your portfolio and check that your data deserves it
Multi-site or per site?
A single-site platform describes one building. It does not compare a head office, a care home (EHPAD) and a warehouse in the same property portfolio. A multi-site energy platform brings these sites onto a common basis: floor areas, uses, climate.
In a multi-site portfolio, aggregating BMSs is the job of hypervision. The hypervisor brings together several brands without being either an EMS or a BMS. The management platform then reads this layer to cover the whole real-estate portfolio.
How do you connect BMSs from different brands?
A multi-protocol controller, a small industrial computer without a screen, translates BACnet and LonWorks (often shortened to LON) into a single supervisor. The other route goes directly through the supervisor of the building management system, with no added hardware. The diagram follows both directions of the flow: the measurements going up, the setpoint coming back down.
Reading means retrieving a temperature or the state of a valve. Writing means changing a setpoint in the installation. A management platform that can only read remains a spectator. Our AI Control, on the other hand, writes to the BMS, including BMSs from different manufacturers.
How many sites justify a platform?
There is no universal threshold. The criterion is the volume consumed, how heterogeneous the portfolio is and the regulatory obligations. Private commercial company, public sector or industry: the logic remains the same.
The return on investment gets much longer on small commercial sites. On such an asset, the savings achieved do not always cover the subscription. Cost reduction is quantified after an audit, on your actual histories.
Should invoices be integrated?
Yes, to check the amounts and for reporting on the OPERAT platform, which asks for annual energy consumption. No, to detect a drift: at a monthly time step, the AHU that has been running at night for weeks goes unnoticed. Meters give the detail. Trend logging in the BMS controllers tells you which equipment consumed when.
The invoice records. It never alerts.
The checklist to go through with your operator before consulting a software vendor
Before any tool is rolled out, the selection criteria are decided first on your side, in the state of your readings. Here are the eight questions to ask your operator before consulting a software vendor.
- 1.Do you know what share of your meters is reliable?
- 2.Does the history have gaps or duplicates?
- 3.Have any meters been disconnected for more than a month?
- 4.Is trend logging active in the controllers?
- 5.Are manual overrides in place distorting the baseline?
- 6.Is the metering plan documented and up to date?
- 7.Are significant energy uses identified per meter?
- 8.Do you have read access to the BMS points?
A “to make reliable” result does not disqualify the project. It sets the order of work: metering plan brought up to date, manual overrides removed, trend logging reactivated, and only then the consultation. A platform installed on dubious readings costs a subscription and a lost year.
Once the foundation is verified, what remains is to define what the tool must be able to do.
Energy management platform: the functions to require, then the rollout
Dashboards, alerts and HDD normalization: monitor and analyze without drowning
An alert is only useful if a team is tasked with acting on it. Otherwise, real-time monitoring ends up as notifications nobody opens anymore.
To monitor a multi-site portfolio, raw energy consumption is not enough. Comparing a glass-fronted head office with a warehouse requires HDD climate correction and EnPIs per use. Without this analysis, every energy report lines up dashboards that are accurate and unusable.
API, export and writing to the BMS: what separates a reporting tool from a lever
Four requirements to write into the contract of any management platform:
- A documented, open API at no extra cost
- Full export of histories and raw data
- Writing setpoints to the BMS, point by point
- Modules that can be activated without changing tool or contract
Management software that reads data without writing remains a reporting solution. No new setpoint reaches a piece of equipment, whatever module is added.
Support and pilot phase: choose the provider before the software
The building owner often decides on the advice of the company selling the tool. Rankings of the industry's best software change nothing: they compare screens, not a support service.
So the pilot is there to judge the provider. Does it fit into the workflow of your organization and your energy manager? Our guide to choosing energy management software details the other selection criteria.
Step 3: build the action plan and decide on an ISO 50001-certified EnMS
Once the pilot is validated, an energy lead or an energy manager structures the process that ADEME describes for the EnMS[7][7]Bodies and institutionsADEME, “Energy management system” (Système de management de l'énergie), Agir pour la transition, businessesSee in sources ↓: energy review, significant energy uses, EnPIs, then an action plan followed in a PDCA cycle.
ISO certification of this energy management system is decided afterwards, if an investor or a tenant requires it. Otherwise, a non-certified EnMS is enough below the threshold of 85 TJ of average annual consumption. Above it, Directive (EU) 2023/1791 requires a certified EnMS by 11 October 2027 at the latest[9][9]RegulationEuropean Union, “Directive (EU) 2023/1791 on energy efficiency”, article 11See in sources ↓.
A falling curve is not a saving
Climate, occupancy, uses: what a dashboard does not correct
A mild winter, a floor emptied by remote working: the curve falls without any gain in energy efficiency. A dashboard shows the drop without correcting it for climate, occupancy or uses.
Market promises, “payback in less than a year” or “guaranteed results”, rarely say what they corrected for. An invoice you claim to reduce is justified by measured savings, not by a trend analysis.
Three questions to ask any supplier announcing a saving
Before comparing two cost-reduction promises, apply the same grid to each supplier.
Expert tip Demand a written answer to these three questions:
- Which baseline, corrected for what?
- Over which measurement period?
- Verifiable by whom?
Without a clear answer, the announced return on investment is not a saving. Only verifiable savings commit the supplier.
Make reliable, control, start: what Foobot does around the platform
BMS advisory: making meters and the BMS reliable before connecting the platform
Our BMS advisory starts with an audit of the meters and the BMS. The support continues during operation with the removal of manual overrides, sequences made consistent again and an action plan shared with the operator. This service has its own value, whether or not a platform or an AI takes over. Energy consumption that is finally readable is already a result.
AI Control: moving from observation to HVAC control every 15 minutes
With AI Control, we train a digital twin of the building on its BMS histories, the weather and occupancy. The AI then adjusts the hot and chilled water loops, the air flow rates and the supply air temperatures, with no works.
It acts every 15 minutes, 24/7, under a 12-month commitment. If a simple sequence is enough to optimize energy consumption, we say so.
Before 2030, first look at what your BMS can already do
Remember three requirements, in this order. Reliable readings first, then a tool that acts or talks to the BMS, and finally savings that are measured rather than declared. What comes next fits in two meetings: go through the checklist with your operator, then scope the platform on your actual portfolio. Our EMS does neither portfolio ESG reporting nor multi-country. To collect and normalize your energy consumption on a first site, start with its free version.
Frequently asked questions about the energy management platform
What is an energy management platform?
It is software, also called an EMS, that collects consumption data, normalizes it with HDD, detects drifts and triggers alerts. Platform, EMS, software: the same thing, three words. It does not act on equipment: the BMS takes care of that.
How do I choose the right energy management platform?
Start from your selection criteria, not from rankings of the best software. Demand a documented API, full export of histories and the writing of setpoints to the BMS. Also check that your meters are reliable before signing.
Why choose an energy management platform?
To bring together in a single history readings scattered across meters, BMS and suppliers. A drift is then spotted before the invoice. Annual consumption figures are also easier to prepare for reporting on the OPERAT platform[6][6]Bodies and institutionsADEME, “OPERAT”, annual consumption reporting platform for commercial buildingsSee in sources ↓.
Is it mandatory to implement an energy management system?
Not for the tertiary decree obligation, which imposes none. Directive (EU) 2023/1791, however, sets a legal requirement: an EnMS for companies above a certain consumption level, otherwise a periodic energy audit[9][9]RegulationEuropean Union, “Directive (EU) 2023/1791 on energy efficiency”, article 11See in sources ↓. Industry and the commercial sector are both concerned.
How do you implement an energy management system?
First make the BMS and the metering plan reliable. Then set a written baseline, before any pilot. Finally, build an action plan followed in a PDCA cycle. ISO 50001 certification is only decided afterwards, if it serves the portfolio[4][4]Standards and protocolsISO, “ISO 50001, Energy management systems”, revised version of 2018 (first edition 2011)See in sources ↓.
How do you monitor and analyze energy consumption?
Start with a reliable metering plan, with active trend logging in the controllers. Then correct consumption with HDD to compare periods and sites. Dashboards only make sense with a team tasked with acting.
What are the benefits of an energy management system?
A justifiable cost reduction, a drift spotted early and a quantified carbon footprint. Provided the savings are measured according to the IPMVP[8][8]Standards and protocolsEVO, “International Performance Measurement and Verification Protocol (IPMVP)”, protocol for measuring and verifying energy performanceSee in sources ↓, the environmental impact becomes a result you can defend before senior management. Without measurement, the benefit remains a promise.
Sources and references
9 sources.- [1]Légifrance, “Decree No. 2019-771 of 23 July 2019 on actions to reduce final energy consumption in buildings used for commercial purposes” (Décret tertiaire)23 July 2019↑ 1 2
- [2]Légifrance, “Decree No. 2025-1343 of 26 December 2025 amending the application dates of the obligations concerning building automation and control systems in commercial buildings”, article 1, postponement to 1 January 2030 for existing buildings of 70 to 290 kW26 December 2025↑ 1 2
- [3]Légifrance, “Decree No. 2020-887 of 20 July 2020 on building automation and control systems in non-residential buildings and automatic heat regulation” (BACS decree)20 July 2020↑ 1 2 3
- [5]Légifrance, “Law No. 2018-1021 of 23 November 2018 on the evolution of housing, urban planning and digital technology (ÉLAN law)”, article 17523 November 2018↑
- [9]European Union, “Directive (EU) 2023/1791 on energy efficiency”, article 1113 September 2023↑ 1 2